PawToolkit — Free Tools for Dog Parents
DogCare, Dog Tools
What it does
Calculators, health guides and more — everything a devoted dog parent needs in one place. Free, no sign-up required.
Calculators, health guides, breed quizzes and more — built specifically for the dogs you love. Practical, no-nonsense tools crafted for the real questions dog parents ask every day. First year, annual, monthly, and lifetime ownership cost estimates by breed size. Search any food — instant safe, caution, or dangerous verdict. Find which breed matches your personality and lifestyle in 7 questions. 8-question lifestyle quiz — get your top 3 personalized breed matches. Find which breeds fit your family, lifestyle, and living space. 15-round breed identification challenge — clues, scoring, and fun facts. Get a realistic first-year, annual, and lifetime cost estimate — customized by breed size,…from pawtoolkit.com
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HandyTools Online26d ago · handytoolsonline.com · ▲225 free browser tools. No signup, no install, just use.


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Hey there, I'm a solo dev behind KewlTools. So I'm one of those people who like to build their own tools/utilities whenever they a) want to get something done, or b) want to learn something. c) don't want to spend ages finding a utilty and going through walls of ads. I gradually built 66 tools, all free, fast, ad-free, and zero login. I (and my family/friends) use these daily, so thought some of you will find it useful! Any suggestions, improving current tools or adding new ones, please let me know.
Toolkit — Free Online Tools30d ago · mytoolkit-app.netlify.app · ▲1Free everyday tools that run in your browser
More life & fun this month
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Life & fun · 10d ago · louisabraham.github.io

Photosynthesis fires two of your iPhone
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Scroll through all 43,252,003,274,489,856,000 reachable Rubik's Cube permutations.
Life & fun · 26d ago · everycube.alen.is


Hi HN, I built Eigendrum, a web tool that solves the 2D wave equation for arbitrary shapes so you can hear what they sound like as drums. How it works: * Solves -∇²u = λu using finite element analysis (Kφ = λMφ) on a triangle mesh. * Validated to <0.1% error against closed-form solutions for circles (Bessel zeros) and rectangles. * Sound model factors in strike location, Rayleigh damping, and mallet width. * Includes Kac drums I & II to demonstrate identical sound spectra from different geometries. * No frameworks, build steps, or dependencies. Repo and tests:…
Life & fun · 27d ago · baselashraf81.github.io
Launched alongside, August 2026
the whole month →- TL
Life & fun · 10d ago · louisabraham.github.io


- SA
Hello HN! I found that picking out plausible but diverse skin tones for my digital art and game development projects was kind of difficult, and I got curious about if there was a way to define a color space that made it easy. I've built a color picker and procedural generation algorithm based on the space as well as a bunch of other fun js features and demos throughout the page that use the equations. If you find it interesting, I have lots of explanations of how I built it and what properties the space has. The methodology might be a bit shaky, but hopefully the result is as helpful for…
Life & fun · Aug 2026 · toneyalexander.github.io


I trained a 125M-parameter transformer to autocomplete piano performances in real time (~108 notes/sec on an iPhone 15). The idea is basically GitHub Copilot or Tabnine, except instead of prompting it with code, you prompt it by playing a few notes on a MIDI piano. The model then continues what you played, entirely on-device. The app is free if anyone wants to try it. Happy to answer questions about the model, training, Core ML, or the many things that didn't work.
AI · 17d ago · simedw.com